[631] Master Lock 875/975 Decoded WITHOUT ANY TOOLS !

this is the lock-picking lawyer and what i have for you today is a master lock model 875 combination padlock this is a relatively new lock only about four years old I believe and the mechanism in it is completely different from the superficially similar master lock model 175 which has been a mainstay of the product line from master lock for several decades now this new mechanism appears to be poised to replace the old and can already be found in the M 175 the 875 which is this lock and the 975 which is the brass version of the 875 now the 175 has a number of well-documented design flaws that master lock seems to have tried to fix in the 875 in order of severity this lock can be bypassed relatively quickly with a tool like this in fact it can usually be done faster than actually dialing the combination and as you can see that was pretty darn quick next the lock can be decoded with this same tool simply by reaching in between the dial and the lock body and feeling for the code wheel on the side and the flat surface on it the final flaw is that a tool is required to change the combination and I see this as a problem because everyone seems to lose this tool very very quickly so what did they fix on the 875 most importantly this lock is no longer by passable I've seen a couple of videos on YouTube suggesting that it's not by passable because you can't fit a tool all the way back into the mechanism and that's actually inaccurate this lock couldn't be bypassed even if there was a huge hole in the side that let you access every bit of the mechanism let me show you why that is now this lock is held together by two pins one on each side so I took another one of these locks and I drilled those pins out when I do that it slides apart we then have a zinc clamshell on the inside that's held together by two rivets so I ground the heads off of those rivets and after we do that we should be able to simply open this up okay let me zoom in on this just a little bit so you have a slightly better look at it now if you look at this mechanism you can see that the only way for this shackle to be lifted out of the lock body is for these rollers to move inward and the only way for these rollers to move inward is for this fork to move downwards the only way that can happen is if all of the true gates on these code wheels are lined up there's no way we can manipulate this mechanism such that it will allow the lock to be opened without these wheels being in the proper position so bypassing is completely out next let's talk about changing the combination because they have improved that as well it used to be as I mentioned that you needed a tool like this to change the combination on the 175 this is not required anymore on the 875 if we look at the bottom of this shackle you can see there is a canned mechanism on the bottom of the long end and that is what actuates the change function so to change the combination of this lock all we need to do is dial the correct combination and right now this is zero zero zero open the shackle rotate the shackle 90 degrees to the number one position we then push the shackle down rotate it another 90 degrees to the two position and then we can change the combination to anything we want I'm gonna change it from all zeros to all ones then we just reverse that motion and we have the combination reset it's very easy and most importantly it doesn't require any special tools it's a clear improvement over the 175 okay now we get to the bad decoding on the old 175 you could decode it as I mentioned by use a tool like this and feeling in between the lock body and the wheels so you could define the combination you can do something very similar on the 875 though master lock did put a tiny little lip on the side of the code wheel that I believe is designed to catch your tool it works a little bit better on on these sides right here it does make it a little bit harder but to be perfectly honest it's not terribly effective if you put a tiny little Bend on the tip of your decoding tool you should be able to reach in there without too much trouble but I don't think that makes any practical difference because there is a far easier way to decode this lock and it doesn't require the use of any tools at all if we take a close look at this mechanism you can see that the beveled top of the fork makes it such that if you pull on the shackle these rollers are pushed into those beveled edges and that put just pushes the fork and down into the code wheels once we bind the fork on the code wheels we can actually decode this by feel simply by turning these wheels master lock tried to mitigate that problem by adding a whole bunch of false gates in fact there is one on every single number here but they made a large mistake in using false gates that are much narrower than the true gates this allows us to very quickly differentiate between the false and true gates simply by feel so let me demonstrate how we would decode this lock first I already know the combination so we need to change this right now it's all ones so we move it to the change position um puts pushing this downward so I can't see and then I'm just gonna scramble these wheels once they've been scrambled enough I'm gonna move it back to one lift it up lock it up and re scramble it so right now I have a lock with a combination that I don't know the only thing you really have to do is pull down on here and feel how much each of these wheels turn so let's get each of these in a in a gate I'm pulling down there's only a little bit of motion on each of these wheels once I determine that I advance each one by one position and once I find a true gate I'll show you the difference between the two I have not found a true gate yet they're really pretty obvious okay I found one on number four watch let me get closer to the camera and then watch how much that moves that's quite a bit now compare it to the number three wheel that only moves just a little bit okay let's advance the first three again okay number three we found the true gate not on two or one we must there we go we just got it open two seven nine two is the correct combination let's do that one more time that took probably as long as it has ever taken me to do that okay let's get each one of these in a gate to start with and then just start feeling okay number three I'm sorry wheel number two is four and it looks like number one is correct too so eight four let me advance just the last two wheels okay looks like I found the correct for number three so up there we go and we got it eight four two two so as you can see this is a very easy lock to decode frankly I think it's faster to decode without a tool than it is when you use a tool so this master lock model 875 is a mixed bag when you compare it to the older master lock model 175 on the positive side the lock can no longer be bypassed and you no longer need a tool to change the combination however you also no longer need a tool to decode the lock which means that opening this lock quickly is within the capability of anyone with a little bit of knowledge that's all I have for you today if you do have any questions or comments about this please put them below if you like this video and would like to see more like it please subscribe and as always have a nice day thank you

Channel: LockPickingLawyer

Views: 3,059,909

Rating: 4.911725 out of 5

Keywords:

Id: bfDPtt-bnAI

Length: 10min 3sec (603 seconds)

Published: Sun Mar 04 2018

Reddit Comments

[u/the-beast561]

I have a lock picking set that I got a few years ago. Very low quality, got the entire set with a see through padlock for just a couple bucks.

Brought it back out the other day because my girlfriend was interested.

Figured I’d give my front door deadbolt a shot.

Took less than a minute, and now I don’t feel secure at all in my house. Neat.

[u/theheartship]

What a joke. Quite an “improvement “

[u/MacacoMonkey]

I find this video oddly relaxing...

[u/Mr_HPpavilion]

Picklock skill has increased by 3

[u/Xuluu]

I had one of these locks on my shed and went out and grabbed it to see if I could duplicate this. It was insanely easy. This guy teaches lock braking a little too well.

[u/AlpineEsel]

Bob Ross voice.

[u/ItsSympulReally]

Happy little accidents!!

[u/ryeguy36]

Whelp, looks like I’ve got a new hobby. Gonna go for a walk. Be back soon!

[u/e_cat77]

Masterlock you had ONE JOB.